Die-casting machine.



G. W. BUNGAY.

DIE CASTING MACHINE. APPLICATION FIILED APR-20. 1911.

' 1,279,650. Patented'Sept, 24,1918- 4 SHEETS-SHEET I.

l/VI/ENTOR A TTOR/VEY G. W. BUNGAY. DIE CASTING MACHINE.

APPLICATION'HLED APR.20. I917.

Patented Sept. 24,1918. D

6. w. BUNGAY. DIE CASTING MACHINE.

APPLICATION FILED APR- 20. I917.

Patented Sept. 24, 1918.

ATTORNEY G. W. BUNGAY.

DIE CASTING MACHINE; APPLICATION FILED APR. 20. p917.

' Patented Sept. 24, 1918.

l/V TOR A TTOR/VEY 4 SHEETSSHEET 4.

I20 1 4 in the molten metal of various'working arts, such as pistons andvalves, and thereore a moreparticularobject of'my present "invention isto construct aneffective" die-.

GEORGE- WALDEMAR suite/av, oFnaooKLYiv, W-roan, jnssr'e ronl'ro acmnnmcnsrme conrommou, A conrona'rroiv ommw Yonx,

,To all whom it may concern:

Be it'known that I, GEORGE WALnnMAn .FBU'NGAY', a" citizen of the UnitedStates, re-

fp rovements. in Die-Casting Machines, of

l which the following is a specification, reference being had'thereintothe accompanyin' drawings forming part thereof.-

'f y invention relates to die-casting vIna-- chinesyand has for itsgenera'lobject the production of-a machine which will success;

fully cast aluminum and other similar metals {which heretofore have,given trouble in forming into castings under pressure; 1knowniasidle-castmgs. A serlous'source of I 'troublefin'casting aluminumand the like by means of die-casting machines as heretofore commonlyconstructed has-been the location casting machine which has no'pistomfvalve -:or the like located. in the molten metal.

--.Other objects and advantages of my invenftion'willhereinafter a peanzMy-pres'ent invention includes a movable pressure chamber or castingpot. provided I with a duct-terminating" ina nozzle adapted tobesubmerged below the'surface ofthe:

l t' ialto be cast so as to permit such ma:

i of parts. as' -will appear from the following, "if p i V w Ishall-nowdescribetheme-casting ma-" terial tofflow in-to thepressurechamber: throughgthe nozzle," this nozzle providing "jth'eonlyTinlet-by which such material may -"enterthe pressure chamber,means-being' -i provided for then raising the nozzle to cast-.

11% position above the-surface of-the mate-1.-

1'18. and means for admitting s'uitabl'e pres- 4 "sure fiuid,-'such'as'compressed air, int'0 the 4 i pressure-chamber for forcingout thematef..firialthrough-the nozzleand jinto a' die or moldfi. My invention. also.includes various features of constructiongand combinations.

chine embodying my "invention illustrated 'inthe accompanying. drawingsand shall thereafterpoint-out myfinvention in claims; I

4 :L'Figurel 'is'a side elevation. ofthe comforming.the-SI b ect-Qf myvapplication for Specification oi Letters Patent.

ew York,

pressed air Fig.- 8 isfa perspective view of the operatopenthe die.

' Patented Sept. 24,1918.

Application filed M11120, 1917. Serial No. 163,406.

plete machine as it appears at rest'. in the idle condition, partsbein'gbroken away to 1 show thes'ubmerged position of the nozzle of thedipper, or pressure chamber;

Fig. 2 is a vertical longitudinal central sectio'iiof the completemachine with parts thereof-shown in the casting position.

Fig. 3 is a partial vertical transverse section on a'plan'e indicated bythe line 3-3 of. Fig. 2 as viewed from theleft and shows the latchingdevice for locking the dipper or,"

pressure chamber-rat the casting position.

Fig. 4 is a plan of the complete machine as it appears in Fig. 2.

F g. 5 is an enlarged horizontal section taken on the line 55 of Figs. 1and Gas :viewed'from'above. and llustrates the valve device in @controlof the supply. of comdi' per. J r

ig, 6 is a vertical section longitudinally of the machine on a planeindicated. by the line 6'6of Figs. 4 and 5 as viewed from below and ofFig. 7 asviewed from the left.

Fig. 7 is a'vertical section transversely of the machine on a planeindicated by the line 7-: 7 of Figs. 1 and 6 as viewed from the ingmeans, appearing in Figs. 1 and 4', for

p1 oyed'.to raise andlower' the nozzle. of the dipper or pressurechamber and to close and Fig. 10 is a'partial verticalsection longi- 7for the pressure chamber or tudinal-ly of the machine on a planeindicated by theline 1010 of Figs. 4 and 9 .as viewed from below.

Fig; 11 is a partial horizontal section simi-- 1ar-to -Fi .,9;on-a"-plane indicated by the line 1l l1 of Figs 1 and '10. i

"Exceptingfasto the features involvin the resent invention, thedie-casting mac ine allustrated in the accompanying drawings isgenerally of a construction similar to that Q i p 1,279,650 v patent forcasting apparatus filed October 5,

117,596. The two above noted applications contain claims, respectively,for the general construction of the machine illustrated in theaccompanying drawings and for the con trolling means employed and alsoillustrated in the accompanying drawings.

The die-casting machine illustrated in the accompanying drawings as anembodiment of my invention has a usual furnace or fire box 1 in theupper part of which is located a receptacle for the material to be castor melting pot 2 of substantially usual construction and arrangement. Acurved casting pot or pressure chamber 3, which is shown as resemblingthe shape of the capital letter J, dips into the molten metal containedin the melting pot 2. The pressure chamber 3 is provided with anupwardly curved duct 4 which terminates in an upwardly directed nozzle 5which in the inactive or non-operative condition of the machineillustrated in Fig. 1 is submerged below the surface of the molten metalin the melting pot 2, but which in the casting position in theoperationof the machine as illustrated in Fig. 2 is located above the surface ofthe molten metal and is shown as raised just above the edge of themelting pot 2. The.

main part or body of the pressure chamber 3 at the end thereof oppositeto'the nozzle.

cross-piece 6 which may be formed integral with the pressure chamber 3and which at its opposite ends is provided with trunnions 7 pivoted inbearin s 8 which are supported upon the top of the furnace or firebox 1. The pivoted trunnions 7 provide for rocking the pressure chamber3 back and forth between the submerged position of the nozzle 5appearing in Fig. 1 and the exposed or casting position of the nozzle 5appearing in Fig. 2. In the lowered position of the nozzle 5, appearingin Fig. 1, the molten metal contained in the melting pot 2 willfiow intothe pressure chamber 3 through the submerged open nozzle 5 and duct 4,and in the position of the nozzle 5, appearing in Fig. 2, molten metalcontained in the pressure chamber 3 maybe ejected or dischargedtherefrom through the delivery duct 4 and nozzle'5 into a suitable die.It will be noted that the nozzle 5 of the pressure chamber 3 is raisedonly slightly above the surface of the molten metal in the castingoperation, so that the nozzle 5 will at all times be substantially ofthe same temperaturea-s the molten metal in the melting pot 2. It willalso be noted that the pressure chamber 3 acts as an auto matic dipperfor dipping up charges of the molten metal from the melting pot 2through the same opening in the nozzle 5 through which these charges areafterward delivered 'or ejected into the die, there being no sep-.

arate inlet opening and consequently no troublesome valve Working, inthe molten metal. The upper or out-er end of the body of the pressurechamber 3 is closed by means of a head 9 and the head 9 is shown ashaving therein a port 10 to which is connected through the delivery duct4 and out ofthe so It will be noted that j nozzle 5 into the-die. k vthe pressure chamber 3 has therein only two openings, one of these beingthe nozzle opening for theingress and egress of the molten metal, andthe other being the opening 10 for the admission and exhaust ofcompressed air to act upon the molten metal contained in the pressurechamber 3. The means for operating the die and for controlling 'thecompressed air will be hereinafter described.

Fluid pressure means are provided for rocking the pressure chamber 3between its. two positions, and such operating means for the pressurechamber 3 will now be described. The upper part of the body of thepressure chamber 3 above the top of the melting pot 2 is provided with arearwardl'y extending operating arm 12 shown as formed integral with thepressure chamber 3. The operating arm 12 of the presm5 sure chamber 3 isconnected to the upper end of a vertical piston rod 13 which carries atits lower. end and is operated by .a double-acting piston 14 in acylinder 15 The .110

located at the rear of the fire box 1. cylinder 15 is shown as having aseparable upper end or head 16 from which this cylinder is supported bymeans of a bracket arm 17 extending from the head 16 and secured to thetop plate of the-fire box 1, as. clearly appears in the drawings. Steamis admitted to or exhausted from the upper and lower ends of thecylinder 15 through upper and lower steam pipes 18 and 19. The means forcontrolling the steam supply -for the operating. cylinder 15 will bedescribed hereinafter. It is only necessary to note now that when steamis supplied to the cylinder 15 through the" upper steam pipe 18 andexhausted through 12 5 the lower steam pipe 19, the pressure chamber 3'will be rocked from the filling position thereof appearing in Fig. 1. tothethrough the lower steam pipe 19:and ex hausted throu h the uppersteam' pipe 18,

the pressure amber or dipper 3 will be returned from the casting ;inFig. 2 to the inactive or osition shown illustrated in Fig. 1.

Lockin ;means are provided for' rigidly --holding t e pressure chamber 3at the castcasting operation;

ing position shown in Fig. 2 so thatit will be able unyieldingly toresist the downward pressure'of the die n on the nozzle 5 in the (Fhislocking-device for the pressure chamber 3 comprises a latch 12 as thisarm descends. The atch hook 20' the path of the descending operatingarm12" 80 and the arrangement is such, as will be. clear hook-20 pivotedupon a stud 21 carried by the cylinder-supporting bracket 17' a t th erear of the fire box 1 and shown as pro ect- .ing from its supportingstud 21 1 diagonally upward into the path of'th'e'o crating arm ispressed toward the engaging position by the weight of a tprojectmgrbentlever .22 which is employe for'manually disengaging the latch hook 20from. the operating;

arm 12 when this arm isto be raised-for depressing thenozzle 5. 7 As thenozz1e\5 is raised from the submerged filling position shown in .Fi 1to'thecastin position ape peering. in ig. .2, the latch ook 20' is mfrom the drawings, particularly Fig. 3, that the downwardly movin arm 12will push aside the hooked end the latch hook 20 and willbeautom'atically engaged therewith when the operating arm 12 has reachedits limit of downward movement for raising the nozzle 5 to the castingposition, as is clearly illustrated inFigs. 2, 3 and 4 ofthe drawings.It will now be clear that the nozzle 5 of the pressure chamber 3 will.

thus be positively. locked ainst downwardmbvement without any re ianceupon the pressure of steam within'the operating cyl- 1 nde 'r 15. Whenthe c'asting'operation ,is- 7 completed the latch hook 20' is -released.or.

disengaged by an attendant, standing at the [back of the machine, who'iscommonly *em-.

.ployed anyway for erformin' other. duties,

. such as wiping ofi t e die'an taking away 7 the ,finished castings.When; the pressure "j chamber" 3 has been, as above described,

locked inthe casting position,it becomes for p the time being and duringthe castingl operation a stationary metal 'containing amber, the nozzle5;of which is just above the surface of the molten metalcontained in themeltin pot 2.". a After the pressure chamber T3 has. e'nthus brought'tothe casting position, the die is "next broughtto'the' cast; inggpositlonand clamped upon the nozzle 5, and the-parts of the machine ior'doin-gthis resemblein Ia ggpleral Way, corresponding v v ac e pformingthesubjec't' o my hereinbefore mentioned application for-- parts of them patentsio casting I apparatus, Serial No.

I ling position,-

be described.-

54,123,"filed October-E5, 1915, and will now- The die is shown ascomprising two-rela- 'tively movable members 23 and 24. each of whichhas a recess 25.invits lower edge so The inlet port 26 registers withthe opening formed by. the nozzle 5 for the admission of the moltenmetal directly from the nozzle 5 into *the die. Y Also it is to be notedthat the nozzle 5 .of-the pressure chamber 3 rises fromcompletesubmergence to the position for, casting which is only justabove the surface 0f the molten metal inthe melting pot 2,

so that the nozzle 5 andthe metal therein are at -all. times kept hot sothat the molten metal Wlll freely flow. a

located that when the die members 23 and g 24 are together in theposition for casting f the recess 25 fits over the nozzle 5.: An inletport 26, shown as formed by a groove in the surface of each tie member,leads from the recess25 to the inside of the die.

. The means for supporting the die mem 'bers 23 and 24 and for movingthem relatively'to each other and to the nozzle {5 will now bedescribed. A frame 27 is shown as box 1,. and extending from, this frameare two horizontal parallel rods 28, one at each side of the machine,the outer ends of these rods 28 being shown'as provided with a supformedintegral with the top plate of the .fire

1port29. ,On eachfofthe rods 28 and adjust.-' f

ablelongitudinallgrthereof is a split bearing 30 which maybe means of aclamp bolt 31 (see Fig. 1); To

' mly clamped in place by facilitate the adjustment I cfthe bearingblock 30, gear teeth forming racks 32 are provided along the lower sideof the rods ion 33 carried by a transverse shaft 34-. w ich An operatingcylinder'37 for the die is provided on its lower side with.a-p'roje'ctingorting' lug 38' which is located between bymeans' of atrunnion shaft 39 about which s pra v r the caring blocks 30a'nd ispivoted to them theoperating c linder 37 together with the parts carriedhereby may rock as 'a pivot. The die-operatlng cylinder 37 is arrangedlongitudinally of the machine and at its end nearest tox the melting pot2 and nozzle 5 has a head 40 from which rigidly project 1 fourrectangularly arranged parallel rods 41 125 which extend back over themelting pot 2.

The outer or projecting" ends of the rods 4 1v supportfa d1e head42*which may be adjusted along the rods 41 by means of nuts 43. The

die 'mei'm'ber23 is secured to and; supported this diehead 42. The nuts43 provide for the independent adjustment of the die head 42 togetherwith the die member 23 carried v thereby.

A second die head or die carrier 44 for the other die member 24 isslidably mounted, by means of bearing sleeves 45, upon the longitudinalguide rods 41. The die carrier 44 carries two vertically arranged spacedprojecting plates 46 which upport the die member 24. The slidable diehead or die carrier 44, together with the guide rods 41 and die head 42,is supported by means of two vertically arranged side bars 47 which passthrough hearings in and are guided by the bearing sleeves of the diecarrier 44. The upper ends of the-vertical supporting bars 47 areconnected together by a crossbar 48 which, at a middle point-thereof,ad-

justably supports the die carrier 44 by means of a depending adjustingscrew 49 which providesfor the vertical'adjustment of the die heads 42and 44 relatively to the nozzle 5, so as to accommodate dies of vari oussizes. The lower ends of the vertical supporting bars 47 are connectedby a cross shaft 51 which is provided with a flanged roller 52 adjacentto each of the bars 47. The rollers 52 are adapted to travel ingu-ideways formed by means of slots 53 in the frame 2?, these,roller-guiding slots 53 being shown as extending longitudinally and asslightly inclined downward toward the the box 1, as clearly appears inthe drawings. The rollers 52 and inclined guideways' 53 perform theimportant function of clampingthe die members 23 and 24 firmly upon theslightly projecting nozzle 5 in the hereinbefore described lockedcasting position of the latter, as appears in Figs. 2 and 4 of thedrawings, this clamping function being performed when the die carrier 44is operated to slide along the guide rods 41 and to move the die members24 up to the die member A second function of the rollers and gnideway 53to raise the a die members 23 and 24 away from the nozzle 5 and abovethe melting pot 2 when the die members 23 and 24 are moved apart by thesliding of the die carrier 44 in the opposite direction upon the guiderods 41', as appears in Fig. 1 0; the drawings. These two unctions ofthe rollers 52 and guideways 53 .will presently more clearly appear inconnection with the description of the means for operating the die,which will now be given.

The die carrier 44 is operated in its sliding movement on the guide rods41 by means of a piston rod 54 connected thereto and to a double-actingpiston 55 in the die-operating cylinder 37. Steam for operating thepiston 55 and the parts connected thereto is admitted to the cylinder 37through steam pipes 56 and 57 connected to ,oppositeends of the cylinder37 and is exhausted through the same pipes. It will now be evident thatwhen steam is admitted to the cylinder 37 through the pipe 56at theright end thereof,

as the machine is illustrated in they drawings,

the die member 24' carried by the slidable die head or die carrier 44will be moved up toward and against the die member'23 carried by theother die head 42, and at the same time the rollers 52 traveling downthe inclined guideways 53 will bring these closed--- together diemembers 23 and 24 down upon the firmly positioned locked nozzle 5 andwill securely clamp the die to the nozzle 5,

the rollers 52 in this clamping action bearing upon the upper surfacesof the guideways 53. When steam is admitted tothe cylinder 37 by thepipe 57 at the left end of the cylinder 37 as the machine is shown inthefrom the nozzle 5 and toe point above themelting pot 2, as appears inFig. 1, this raising of the die members 23 and 24 taking place as thesemembers are separated by the sliding of the die carrier 44 toward thedieoperating cylinder 37, as will be readily understood. In view of thefact that the molten metal is fed to the die under pressure,

it is very important both that the nozzle5 of the pressure chamber3'shall be firmly locked in place and that thei die shall be securelyclamped to the nozzle 5. l

The die-casting machine illustrated in the drawings is so arranged thatthe pressure chamber 3 is first rocked to raise the nozzle 5 and lock itat its raised casting position, where it is heldwhile the die members 23and 24 are operated to close together and .be clamped upon the nozzle 5.Next the molten metal is forced from the pressure chamber 3 After thisthe die members 23 and 24 are un clamped,.separated and elevated torelease the casting, and finally the pressure chamber 3, after it hasbeen unlocked, is rocked to again submerge the nozzle 5.

The casting, which is carried by the die member 24, is ejected therefromby means of ejector pins 58 shown as projecting from a plate 59 carriedby ejector" rods 60 passing through and guided by the die carrier 44.Upon the movement of the die carrier 44 toward the operating cylinder 37the free ends of theejector rods 60 come in contact with abutmentprojection 61, carried by an abutment plate 62 shown as adjustably and55 of the respective fluid pressure cylinthrough the duct 4 and nozzle 5into the die.

llt

ders and 37, for successively operating the pressure chamber 3 and thedie carriers 42 and 44 in proper succession", as above. noted,

so that, starting'from the non-operative position of rest of the machineappearing in Fig. 1, the nozzle 5 of the pressure chamber 3' will befirst elevated while the die carriers 42 and 44 are maintained in theelevated and separated condition; and-so that these die carriers will beclosed together and moved, downward into clamping relation with the?nozzle 5 during the time that this nozzle is maintained at theelevatedposition, as above noted; and so that. then, after the moltenmetal has been forced into the die, thedie members 23 and 24 will beunclamped and raised and separated; and so that, as a final part of theoperation after the makin of a casting, the pressure chamber 3 will bescribed to an extent necessary to make clear the operation of themachinevof the present invention.

Secured to the head of the die-operat-' ing cyl-inderw37- is a two-partcasing comprising a cam chamber" 64 and a' valve chamber 65, whichcontain the valvesand the operatin more particu arly illustrated inFigs. 9, 10

and 11 of the drawings. The valve chamber 65 is shown as ofsubstantiallyrectangular shape, and one corner of this chamber, shown asxthe-upperright hand corner in Fig. 9, ispartitioned off to form' an inlet headeror inlet manifold 66 which extends throughout .the.full lengthvertically of the valve chamber and to the upper end of which there isconnected a steam supply pipe or inlet pipe 67 (see Figs. 1, 4, 9 and10) In the opposite corner of the-valve chamber 65 diagonally from thesteam inlet manifold '66 there is similarly partitioned off an exhaustvmanifold or exhaust header 68 which also extends vertically throughoutthe length of the valvechambero65 and which at the top and frontthereofis, pro-.

vided with an exhaust pipe 69 (see Figs; 1,. i

forthe pipe 18" which admits steamlto thev .upper' end of thenozzle-operatm' cylinder 1 4, 9 and 10); The remaining irregular spacewithin the valve chamber 65, is divided by artitions so as to {form'-three transverse a tier of four sma l chambers or pockets 70, 71, 72 and73 arranged vertically one above the other alongside of and betweentheinlet manifold 66 and e exhaust manifold 68, as most clearly appearsin Fig. 10, these individual pockets being shown as numbered from the 4top downward. Four springpressed inlet valves 74,75, 76 and 77, ar

mechanism therefor, as is" 'Itisto ranged in a vertical seriesand shownas of the puppet ty e, are adapted to connect the inlet manifol 66 withthere ective in-- dividual steam pockets 70, 71, 2 .and 73, 'I I and asimilar series of exhaust valves 78,

79, 80 and 81 are in controlof communica tion between these respectivesteam'pockets and the exhaust -man1fold 68. Connected to .therespectiveindividual steam pockets 7?, 71, 72 and-'73 are the respective pipes 556- 19 and-1'8, of which, as hereinbefore described, the pipe 57 isconnected to the die-operating cyl nder 37 at the .left end thereof, thepipe 56 is connected to this cylinder at the right thereof, the pipe 19is connected to the lower end of the pressureehamber-operating ornozzle-operatin cylinder 15, and the pipe 18 is connecte to the upperend of the same cylinder. 'It will now be evident that any one of thesesteam pipes may. be connected either with the steam inlet manifold 66 orwith the exhaust. manifold 68 through its individual steampocketvprovided' with an inlet valve and an exhaust valve as abovedescribed;

A cam mechanism now to be describedis provided for operating thesevalves. in the proper sequence ,or succession. A1vert1cal cam.shaft"8 2is journaled in the cam champrovided with an operatingwheel' 83 from I Yber 64 and at its upper end is exteriorly which there projectsan'operating handle '84 i 7 (see -Figs. 1 and 4). The: inlet valve andthe exhaust valve for each of the individual steam pockets 70, 71, 72 or73 are operated to be opened alternately by means of the cams carriedbythe cam shaft 82 and. act- I ing upon rock arms which engage the stemsof the respective valves. .For example, the

steam inlet valve 74 for the pipe'57 which is connected to the left endof the cylinder 37 is operated by a cam 85 which acts upon a rock'. arm86, as shown in Fig. 9, andv the pair; of valves, comprising an inletvalve and an exhaust valve for the respective ipes 56, 19 and 18,; issimilarly controlled y .a pair of cams acting upon a slmllar pair ofrock arms;

a rock arm v90 to operate fthe inlet valve 77;

For example, there is .shown in- Fig. 11 a cam 89 which acts upon 15 forraising the submerged nozz' e .5 to the,

casting position, and. there is \also shgwn another cam 91 alongside ofthe cam & ;'on the cam shaft 82 and this. cam 91 acts-.ppon

an oppositely arranged ro'ck arm '92 foroperatmg the pipe 18.

be noted that the raised cam faces of the difle'rent cams. are longer orshorterexhaust valve 81'forthis same of the fact that thevalve-operating cams are.

according to the length of time that the respective valves arerequiredto be held open during the rotative valve-controlling movementof the cam shaft 82. The valve-controlling device illustrated in thedrawings is constructed'and arranged so that a. complete operation ofthe die-casting machine is caused to take place during two half rota--tions'of the cam shaft 82 which, so far as the operation of the machineis concerned, may be in thesame' direction of rotation, thereby to makeone complete rotation of this shaft, or the half rotations may be inopposite directions, half way around and half way back again, and thisis the manner in which the machine illustrated in the draw-- ings hasbeen operated, the half rotations of the cam shaft 82 being manuallyimparted by means of the operating handle 84:, which is moved from theposition appearing in Fig. 1. half way around to the position shown inFig. 4 andback again, by an operator standing at the front of themachine. In view made in symmetrical halves, the operating handle 84:maybe moved in either direction,

around toward the front or. around toward the back, from the positionappearing in Fig. 1, but it has been found most convenient in theoperation of the machine tomove this handle through the front half ofthe circle, and the valve-operating action of the cams. will now bedescribed in reference to such movement of the handle 84.

It will be noted that the cam 85 for operating the inlet valve 7 of thepipe 57 has an extended raised concentric'cam face and that thecompanion cam 87 for operating-the cor responding exhaust valve 78 has ashort or peaked raised cam face. In thisconnection t 1 s'to beunderstood that the pair of cams 7 (not appearing in the drawings) foroperatmg the inlet and exhaust valves 75 and 79 1 the inlet valve 74.Likewise it is to be unrespectively for the pipe-56 leading to the otherend of the operating cylinder 37, are complementary to the cams 85 and87 in that the cam for operating the inlet valve will have a short orpeaked raised cam face,

. while the cam for operating the. exhaust .valve 79 will have aconcentric extended cam face similar in this respect to. the cam 85' forher-operating cylinder 15, has an ex- .tended raised cam surface forholding open this valve during the casting operation, 7 while the cam 91has'a short-or peaked raised cam surface, for opening the exhaust valve81 for the upper end of the cylinder 15 at the positionof rest of themachine appearing Therefore, in the above noted complementarypair'ofcams (not shown) the cam for operating the inlet valve 76 thepipe 19 leading to the lower end of the" in Fig. 1.

cylinder 15, will have 'a correspondingly s ort or peaked raisedoperating face, while its companion cam for operating the ex haust valvefor the pipe 19 will have an extended raised cam face.

When the operating handle 84 is rotated through a quarterturn or ninetydegrees it will be noted that no change takes place 1n the position ofthe valves in control of the steam pipes 56 and 57 of the cylinder 37and that therefore the open and elevated position i of the die members23 and 24: appearingin F ig.. 1 will be maintained without change duringthis movement. However, as will be clear from an inspection of Fig. '11,during thisquarter turn of the cam shaft 82, a. complete-change has beenefi'ectedin the posh tions of the valves controlling the nozzleoperatingcylinder 15, the exhaust valve 81- of the pipe 18 having been firstclosed by the peaked orshort-facedbamtl followed immediately by theopening of the inlet valve 7 7,0f this pipe the long or extended-facedcam 89. The complementary cams not shown have effected the reverseresult as to the position of the valves for the pipe 19 leading to theother or lower end of the cylinder '15 and have closed the inlet valve76 and opened the companion exhaust yalve 80'. It will now be clearlyevident that the piston '14 in the cylinder 15 will be actuated andforced to the bottom of the cylinder 15, thereby to rock the pressurechamber 3' and raise its submerged nozzle '5 in the manner.hereinbefore-described.

As the operating handle 84 is moved through the remaining ninety degreesto the position thereof appearing in F ig. l, to complete the halfrotation of the cam shaft 82, the position of the valves for the cyhnder15 which actuates the pressure chamber 3 will not be changed, but theposition of the valves for the die-operatingcylinder 37 will be completely changed, as will be clear from an in-i spection of Figs. 9' and11, it being noted that the extended concentric raised cam. face of thecam 89 will maintain the inlet valve. 77 open while the corresponding.exhaust valve 81 will be kept closed by its operating;

cam 9l, and that now the cam '85 has closed the inlet valve 7491s thepipe 57 of the operating cylinder 37jland the companion cam 87 havingthe shorteam projection has opened the corresppndinig exhaust valve 78,while the comple'm same opened the iiitake valve 25 of the pipefificamslnot shown have atthe g ha'ust valve 79 and leading to the other enti the cylinder 37.. The piston 55 of the cylinder 37 will now beappearing in Fig. 1 to the casting position appearing in Figs. 2 and.4of the drawings.-

In this position of the parts of the machine, compressed air is admittedinto the body part of the pressure chamber 3 through the port 10 and.pipe 11, and forces the molten metal from the pressure chamber 3 out.

through the duct 4 and nozzle 5 and through the port 26.i nto the dieormold'co'mprising the sections or members 23 and 24.

When thecasting has'set the operating handle'84 is-reversed and broughtback from the position appearing inFig. 4 to the orig inalpositionappearing in Fig. 1; or, as

V hereinbefore noted, instead of reversing the movement of the. handle84 its 'movement" could he continued in the same direction to completethe rotation andwith the same re-g 'sult. With the return of theoperating handle 84 to its original position, as shown 7 in Fig. 1,all'of the valvesare again actuated but in the reverse order, as will bereadily understood, so that first the die members 23.

and-24 will be unclamped and raised-from the nozzle '5 and thereafterthe pressure chamber 3, which in the meantime has been" unlocked-by theattendant, will be rocked awayfrom the casting position tothe positionof submersion ofthe nozzle 5, so that when the operating; handle 84 isat its orig mal position-appearing in Fig. 1, the operat-v ingpartsofthe machine will then have successively changed in the order recitedfrom their position appearing in Fig. 2 to the position thereof shown inFig. 1, "ready for the next casting operation.

' molten metal therefrom into the closed die will now be described. Avalve casing 93 is The means for controlling the pressure fluid which issupplied through the-pipe 11 to the pressure chamber-3 for ejecting thesupported bya plate 94 secured'to thetside of the fire box 1, as a pearsin Fig. 1. The valve casing 93 has t ereinya middle chamber 95 to' whichthe pipe'll leading to the pressure chamber-Y3, is connected- Above thismiddle chamber 95 the casing '93-is rovided with an inlet chamber 96 towhic is connected a supply pipe 97 which may pro-.

ceed from a source of s'upply of any suitable 96 and {middle chamber ordistributingchamber 95, and an exhaust valve 102 of the puppet type,'cl'osed by a spring 103, controls 1 communlcation between themiddle chamber 95 and the exhaust chamber 98. The stems of the valves100 and 102 project belowthe valve casing 93, and for opening thesevalves are adapted to be engaged by the respective arms of a two-armrock lever 104 carried by a longitudinally extending rock shaftz105which is iournaled in bearings on the su porting p ate 94, as appearsmost clearly in ig. 1'. The arrangement is such, as will be evident:from an inspection ofrthe drawings,

particularly Fig. 7, that one of these valves 100 or 102 will not beopened by the rocker 104 until theoth'er valve has been permitted toclose. Normally the inlet valve 100 is 'imaintained' in closedconditionand the exhaust valve 102 is maintained open, so that therewill be no fiuid pressure upon the molten metalcontained in the pressurechamber 3, such pressure, being only applied thereto when it is desiredto force such metal y from the pressure chamber"3 into'the closed die.This condition of th'evalves 100 and to a stationary part of the.machine, the

suitable pressure flu' spring 106 being strong enough to overcome .102ismaintained bv'mea'ns of a retractile hold, the exhaust val" e 102open. ,The valves the valve-closing s'p ng 103 and thereby to and102*are opgrated to close the exhaust valve 102 and to open the inletvalve 100 for admitting comdpre'ssed air, or other i into the pressurechamber 3 by means of a manually operated handle lever 108 which extendsupward from the rock shaft and which 1s shown as forming'a continuationfrom the outer end of the rock shaft 105. To admit the pressure fluid tothe pressure chamber 3 for forcing the molten metal therefrom into thedie, the hand lever 108- is moved in a counter- -clockwise direction orto the left asviewed fromthe rightfin Fig.1, thereby to open the inletvalve 100 while the exhaust valve 102 remains closed, as appears in Fig;7. After the molten metal has been forced into the die, the pressure"in-the pressure chamber 3i s'released before the unclamping of the dietmembers 23 and 24 from the nozzle 5. To release the uponthe. retractilespring 106 will move this pressure of pressure fluid in the pressurechamber 3, it is only necessary to let go. of the handle-love 108where-.

pressure fluid, such as compressed air. Be\lever to the right, "rotatingthe rock shaft 105 in a clockwise direction as viewed from low themiddle chamber 95 the valve ca mg 93 is provided with an exhaust chamb r98 which opens tothe atmosphere through an puppettype, closed by aspring 101, controls comml'mication between the; inlet chamber the righti'n -Fig.'1, thereby. oscillating the ,1 rocker\10 4 to pernut theinletvalve 100 to exhaust port 99. An inlet valve 100 of the,

close and also so as to open the exhaust valve 102 for the escape ofthen'es'sure fluid from the pressure chamber 3 1; t t e pip-e u 7 to theatmosphere through the exhaust chamber 98 and port 99. Safety means areprovided to prevent the admission of pressure fluid to the pressurechamber 3, excepting when the die members 23 and 24 are securely clampedto the nozzle 5. This safet device comprises a U-shaped' away from itsoperating cylinder 37 to close together the die members and 24 and clampthem vupon the nozzle 5, the hand lever 108 may then freely pass thereversely pro1ecting free end of this guard member, as is shown'in Figs.4 and 8 of the drawings. However, in the retracted position of the diecarrier 44, in which the die members 23 and 24 are separated andelevated above the nozzle 5, the hand lever 108 is engaged by thereversely projecting guard member 109, thereby'locking the lever 108 sothatrit cannot be moved to admit pressure fluid to the pressure chamber3,,this locked position of the hand lever 108 being illustrated in .thedrawings in Fig. 1. This locking arrangement prevents the possibility ofoperating the hand. lever 108-at the wrong time and thereby ejectingmolten metal from the pressure chamber 3 through its duct4 and nozzle 5at a time when the die members 23 and 24 are not securely clamped to thenozzle 5, the guard 109 being so adjusted that it will only release thehand lever 108 in the casting p0- sltion of the parts of the machine.

The complete operation of the machine can now be readily understood andwill be briefly noted. Starting'from the position of rest of the machineillustrated in Fi 1, the operating handle 84 of the whee 83 of thevalve-operating cam shaft 82 is first moved through an arc of onehundred and eighty degrees, to the position shown in Fig. 4,

thereby to cause the successive lifting and automatic locking inposition of the nozzle 5 and the subsequent closing together andclamping to this nozzle of the die members 23and 24, as above described,this being the casting position of these parts of the machineillustrated in Figs. 2 and 4. The hand lever 108, which has-beenunlocked by the movement of the die carrier 44, ma now be moved to rockthe rock shaft 105 or thereby admitting pressure fluid, such ascompressed air, to the to of the pressure chamber 3, above the sur aceof the molten metal con tained therein, thereby forcing:-the molten"metal fromthe pressure chamber 3 ,throu' h its duct'4 and nozzle 5 intothe moldor ie formed by the closed-together and "clamped die members 23and 24. After a brief period of rest,- for the sufiicient hardening orsetting of the casting, the hand lever 108 is simply released,upon'which it is automatically re-' turned by the retractile spring 106,which, as above noted, is strong enough to overcome the valve spring103, with the result that first the. supply of pressure fluid to thepressure chamber 3 is out 011 by the closing of the inlet valve 100 andimmediately thereafter the pressure fluid contained in the pressurechamber 3 is permitted to escape or is;

trolling hand lever 108, the operating handle a 84 of the wheel 83 isbrought back through a half rotation from the position illustrated inFig, 4 to its original position, shown in Fig. 1, thereby, as abovedescribed, successively to raise and separate the, die members 23 and24' and to lower and again submerge the nozzle 5 of the tippingorrocking pressure chamber 3 which, in the meantime, has been unlocked bythe attendant standing at the back of the machine raising up the bentlever '22 of the latch hook 20. The machine is now ready for successiverepetitions of this complete operation.

In this connection it should be noted that in making small castings thepressure chamber 3 will be found to contain enough molten metal to makeseveral of these castings successively without the necessity of movingor rocking this pressure chamber to dip up more molten metal from themelting pot 2 through the nozzle 5, and in such cases the pressurechamber 3 may be'left lockedin the casting position durin severalsuccessive casting operations. T s result is accomplished by returningthe operating handle 84 from the casting position, appearing m Fig. 4,through only nlnety degrees of its return movement, thereby to unclampand elevate and separate the die members 23 and .24 without the rocking'of the pressure chamber 3, which is maintained and kept locked at thecasting position. From this half-way returned or ninety degree positionof the operating handle 84, this handle is not brought all the way backto its original position ing position through the last ninety degrees ofits one hundred and eighty degree are of complete movement. This willresult in the die members -23, and 24 being again closed together andclamped upon the nozzle 5, for a second casting o eration without thenozzle 5 having been su mer ed between the casting operations, Succasting operations without the clipping or submerging of the nozzle 5may be successively performed so ut is reversed and returnedto the casti long as there is sufficient metal contained in the pressure chamber 3,it being understood, of course, that, the hand lever 108, which isunlocked by the closing together and the clamping of the die members 23and 24, is rocked once for each casting operation.

It is obvious that various modifications in a nozzle vadapted to besubmerged below the surface of such material for permitting suchmaterial to flow into the pressure chamber through said nozzle, saidnozzle providing the only inlet for such material to enter the pressurechamber, means for raising said'nozzle above the surface of suchmaterial, and means'for supplying and admitting a fluid under pressureinto the pressure chamber to act upon the material wlthin the pressurechamber and eject such material from the pressure chamber through saidnozzledirectly into the die.

2. A casting machine hav'ing,in combina-. tion, a receptacle for thematerial to be cast,

a movable die, a'pressure chamber pivoted for rocking movement andprovided with a duct terminating in a nozzle adapted to be submergedbelow the surface of such material for permitting such material to flowinto the pressure chamber through said nozzle, said nozzle providing theonly inlet for such material to enter the pressure chamber, fluidpressure means for imparting-rocking move ment to the pressure chamberfor raising the nozzle above the surface of such-material, andmeans forsupplying and admitting a fluid under pressure into the pressuecham herto act upon the material within thepressure chamber and eject suchmaterial 3. A casting machine having, in combinatlon, a receptacle forthe material ,to be cast, amovable die, a movable pressurev chamberprovided with a duct terminating in a nozzle adapted to be submergedbelow the surface of such material for I pressure chamber through saidnozzle, said permitting such material to flow ,into the nozzle providingthe only inlet for such material to enter the pressure chamber,

means for raising said' nozzle above the surfaceof such material, meansfor locking the pressure chamber in the casting position with its nozzleabove the surface-of the material in the receptacle, and means-for sup--plying and admitting a fluid under pressure into theipressure chamber toact upon the material withln the pressure chamber and e ect suchmaterial from the pressure chajngber' through said nozzle directly intothe ie.

4. A easting machine. having, in combination, a receptacle for thematerlal to be cast,

a movable die, a pressure chamber pivoted.

for rocking movement and provided with a duct terminating in a nozzleadapted to be submerged below the surface of such material forpermitting such material to flow into the pressure chamber through saidnozzle, said nozzle providingthe only inlet for sure'chamber to act uponthe material Within the pressure chamber and eject such material fromthe pressure chamber through the nozzle directly into the die.

5. A castingm'achine having, 1n combination, a receptacle for thematerial to be cast,

a movable pressure chamber provided with a duct terminating in a nozzleadapted to be submerged below the surface of such material forpermitting such material to flow 7 into the pressure chamber throughsaid nozzle, said nozzle providing the only inlet for such material-toenter the pressure chamber,

means for raising said nozzleabove the surface of such material, movabledie-su'pporting means, a die carriedby the die-supporting meansandadapted to receive directly] from the nozzle the material to' be cast,and means for supplying and admitting a fluid under pressure into thepressure chamber to act upon the material within the pressure chamberand eject such material from the pressure chamber through said nozzleinto the die. p

, 6. A casting machine having, in combination, a receptacle for thematerial to be cast, a movable pressure chamber provided with a ducttermmatingin a nozzle adapted to be, submerged below the surface of suchmaterial for permitting such material to flow into the pressure chamberthrough said nozzle, said nozzle providing the only inlet for suchmaterial to enter the pressure chamber,

means for raising said nozzle above the surface of such material, meansfor locking the pressure :chamber in the casting position therewith,such die being adaptedto receive directly from. the nozzle the materialto be cast, means for clamping the die firmly to the nozzle in theelevated and locked position of'the latter, and means for supplymg andadmitting a fluid under pressure into the pressure chamber to act uponthematerial within the pressure chamber and eject such material from thepressure chamber through said nozzle into the die.

7.=A casting machine having, in combination, a receptacle for thematerial to be cast, a pressure chamber pivoted for rocking movement andprovided with a duct ter- 'm1nating in a nozzle adapted to be submergedbelow the surface of such material for permitting such material to flowinto the pressure chamber through said nozzle,

. said nozzle providing the only inlet for such material to enter thepressure chamber, fluid pressure means for imparting rocking movement tothe pressure chamber for raising the nozzle above the surface of suchmaterial, means for locking the pressure chamber in the casting positionw1th its nozzle above the surface of the material in the receptaclepivoted die-supporting means, a sectional die mounted upon saiddie-supplorting means and movable therewith, su die being adapted toreceive directly from the nozzle the materlalto be cast, means forclamping the die firmly to the nozzle in the elevated and lockedposition of the latter, and means for supplying and admitting afluidunder pressure into the pressure chamber to act upon the material withinthe ressure chamber and eject such. material rom the pressure chamberthrough the nozzle into the die. I

8. A casting machine having, in combination, a receptacle for thematerial to be cast, a movable pressure chamber provided witha ductterminating in a nozzle adapted to be submerged below the surface ofsuch material for permitting such material to flow into the pressurechamber through saidnozzle, said nozzle providing the only inlet forsuch material to enter the pressure chamber, means for raising saidnozzle above the surface of such material, means for locking thepressure chamber in the casting position with its nozzle above thesurface of the material inthe receptacle, pivoted die-supporting means,a sectional die mounted upon said die-supporting means and movabletherewith, such die being adapted toreceive directly from the nozzle thematerial'to be cast, means for clamping the die firmly to the nozzle inthe elevated and locked position of the latter, fluid pressure means formoving the die-supporting means on its pivot and whereby the diesections are moved relatively to thenozzle and to each other, andmeansfor supplying and admitting a fluid under pressure intothe pressurechamber to act upon the material within the pressure cha'mberand e ectsuch material from the 1pressure chamber through said nozzle into t edie.

9. A casting machine having, in combination,'a receptacle for thematerial to be cast, a pressure chamberpivoted for rocking movement andprovided with a duct terminatmg in a nozzle adapted to be submergedmitting such material to flow into the pressure chamber through saidnozzle, said nozportin means and movable therewith, such die bem adaptedto receive directly from the nozz e the material to'be cast, means forclamping the die firmly to the nozzle in the elevated and lockedposition of the latter, fluid pressure means for moving thedie-supporting means on its pivot and whereby the die sections aremovedwela'tively to the nozzle and to each other, and means'forsupplyingandadmitting a fluid under pressure into the pressure chamberto act u on the material within the pressure cham er and eject suchmaterial from the pressure chamber through the nozzle into the die.

' 10;. A casting machine having, in combination, a receptacle for thematerial to be below the surface of such material for percast, a movablepressure chamber provided with' a duct terminating in a nozzle adaptedto be submerged below the surface of such material for permittin suchmaterial to flow into the pressure cham r through said noz-.- zle, saidnozzle providing the only inlet for such material to' enter the pressurechamber,-

-fluid pressure means including a piston for raising saldnozzle abovethe surface of such material, means for locking the pressure chamber inthe casting position with its nozzle above the surface of the materialin thereceptalcle, pivoted die-supporting means,

n said die-sup,

asectional die mounted u portin means and movab e therewith, such diebeing adapted to receive directly from the nozzle the material to becast, means for clamping the die firmly to the nozzle in the elevatedand locked position of the latter; .fluid pressure means including a,piston for. moving the die-sugporting means on its ivot w ereby the 1ssections are move relatively to the nozzle and to each other,

meansfor supplying and admitting a fluid under pressure into the 'ressure chamber to act upon the material withm the pressure chamber andeject such material from the pressure chamber through said nozzle intothe die, and fluid pressure controlling means for operating therespective pistons of the different fluid pressure means successively,

whereby the nozzle is elevated above the surface of the material in thereceptacle and locked in that position-"and thereafter the die sectionsare closed and clamped to the nozzle, and whereby after the material hasbeen forced into the die the die sections are unclamped from. the nozzleand opened and thereafter the pressure chamber is operated to againsubmerge the nozzle below the surface of the material, in thereceptacle.

- 11. A casting machine having, in combiv nation, a receptacle for thematerial to be -cast, a pressure chamber pivoted for rockthe pressurechamber in the casting position with its nozzle above'the surface of thematerial in the receptacle, pivoted die-supportin means, a sectional-diemounted upon said ie-supporting means and movable therewith, such diebeing adapted to'receive directly from the nozzle the material to becast, means for clamping the die firmly to the nozzle in the elevatedand locked position of the latter, fluid pressure means including apiston for moving the die-supporting means on its pivot and whereby thedie sections are moved relatively to the nozzle and to each other, meansfor supplying and admitting a fluid under pressure into the pressurechamber to act upon the material within the pressure. chamber and e ectsuch material from the pressure chamber through the nozzle into the die,and fluid pressure controlling means for operating the respectivepistons of the diiferent fluid pressure means successively, whereby thenozzle is elevated above the surface of thematerial in the receptacleand locked in that position and thereafter the die sections are closedand clamped to the nozzle, and whereby after the material has beenforced into the die the die sections are unclam ed from the nozzle andopened and therea ter the pressure chamber is operated to againsubmerge. the nozzle below the surface of the material in thereceptacle. a

12. A casting machine having, in combi nation, a rec eptacle for thematerial'to be east, a movable pressure chamber provided 1 with a ductterminating in a nozzle adapted to be submerged below the surface ofsuch material for permitting such material to.

flow into the pressure chamber through said nozzle, said nozzleproviding the only inletfor such material to enter the pressure chamber,means for ralslng said nozzle 7 above position with its nozzle above thesurface of the material in the receptacle, pivoted die-supporting means,a sectional die mounted upon said die-supporting means and movabletherewith, such die being adapted i to receive directly from the nozzlethe material to be cast, means for clampin vthe the surface of suchmaterial, means for locking the pressure chamber in the cast ng.

die firmly to the nozzle in the elevate and locked position 01' thelatter means for supplying and admitting a fluid under pressure into thepressure chamber to act u on the 'material Within the pressure cham erand eject such material from the pressure chamber through' said nozzleinto the die, a valve device in control of the pressure fluid for thepressure chamber, and means in control of said'v'a'lve device forpreventing the admission of pressure fluid into 'the pressure chamber untilafter the die has been clamped to the nozzle.

13. A casting machine having, in combination, a receptacle for thematerial to be cast, a pressure chamber pivoted for rocking movement andprovided with a duct terminating in a nozzle adapted to be submergedbelow the surface of, such material for permitting such materialto flowinto the pressure chamber through said nozzle, said nozzle providing theonly inlet for such material to enter the pressure chamber, fluidpressure means for imparting rocking move ment tothe pressure chamberfor raising the nozzle above the surface of such material,

means for locking the pressure chamber inthe casting position with itsnozzle above the surface of the material. in the receptacle, pivoteddie-supporting means, a sectional die mounted upon said diessu port-ingmeans and movable therewith, such ie being adapted to receive directlyfrom the nozzle the material to be cast, means for clampin the diefirmly to the nozzle in the elevate and locked position of the latter,means for supplying and admitting a fluid under 'pressure into thepressure chamber to act upon the-material within the pressure chamberand eject such material from the pressure chamber through the nozzleintothe die, a

valve device in control of the pressure fluid for the pressure chamber,and means in control of said valve device for preventing the admissionof pressure fluid intothe pressure chamber until after the die has beenclamped to the nozzle.

. sition and thereafter the die sections are 14. A casting machinehaving, in combifor such material to enter the pressure chamber, fluidpressure means including a iston for raising said nozzle above the surace of such material, means for locking the pressure chamber in thecasting osition with its nozzle above the surface 0 the material in thereceptacle, pivoted die-supporting means, a sectional die mounted uponsaid die-supporting means and movable therewith, such die being adaptedto receive directly from the nozzle the material to be cast, means forclamping the die firmly to the nozzle in the elevated and lockedposition of the latter, fluid pressure means including a piston formoving the die-supporting means on its pivot and whereby the diesections are moved relatively to the nozzle and to each other, means forsupplying and admitting a fluid under pressure into the pressure chamberto act upon the materia'l within the pressure chamber and eject 30 suchmaterial from the pressure chamber through said nozzle into the die,fluid pressure controlling means for operating the respective pistons ofthe different fiuld pressure means successively, whereby the nozzle iselevated above the surface of the material in the receptacle andlocked-in that poclosed and clamped to the nozzle, and wherebyafter thematerial has been forced into the die the die sections are unclampedfrom the nozzle and opened and thereafter the.

pressure chamber is operated to again submerge the nozzle below thesurface of the material in the receptacle, a valve device in control ofthe pressure fluid for the pressure chamber, and means in control ofsaid valve device for preventing the admission of pressure fluid intothe pressure chamber unt1l1 after the die has been clamped to the nozze.

15. A; casting machine having, in combi nation, a receptacle forthematerial to be cast, a 'pressure chamber pivoted for rocking movementand provided with a ductterminating m a nozzle adapted to be submergedbelow the surface of suchmaterial for permittinlg sure camber throu hsaid nozzle, said nozzle providing theonly inlet for such material toenter the pressure chamber, fluid pressure means including a piston forimparting ro'ck' movement to the pressure e such material to How intothe pres-.

I such' material amberfor raising the nozzle above the surface of suchmaterial, means for locking the pressure chamber in. the castingposition with its nozzle above the surface of thejmaterial in thereceptacle, pivoted die-supporting means, a sectional die mounted uponsaid die-supporting means and movable therewith, such die being ada tedto receive di-' rectly from the nozzle t e material to .be cast, meansfor clamping the die firmly to the nozzle in the elevated and lockedposition .of the latter, fluid pressure means ineluding a piston formovin the die-su porting means on its pivot an whereby t e die sectionsare moved relatively to the nozzle and to each other, means forsupplying and admitting a fluid under pressure into the pressure chamberto act upon the material within the pressure chamber and eject suchmaterial from the ressure chamber through the nozzle into-t e die, fluidpressure controlling means for operating the respective pistons of thedifl'erent fluid pressure means successively, whereby the nozzle iselevated above the surface of the material in the receptacle andlocked'in that position and thereafter the die sections are closed andclamped to the nozzle, and whereby after the material has been forcedinto the die the die sections are 'unclam ed from'the nozzle and openedand thereaiger the pressure chamber is operated to again submerge thenozzle below the surface of the material in the receptacle, a valvedevice in control of the pressure fluid for the pressure chamber,

and means in'contrdl of said valve device for preventing theadmission'of pressure fluid into the pressure chamber until after thedie has been clamped to the nozzle.

16. A casting. machine having, in combination, a receptacle for thematerial to be cast, a movable pressure chamber provided with a ducttermmating in a nozzle adapted ing means to move therewith and adaptedto receive directly from the nozzle the material to be cast, means forclamping the die firmly to the nozzle in the elevated and lockedposition of the latter, and means forsupply'ing and admit-tin thepressure 0 amber toact'u rial within the ressure cham r and eject om thepressure chamber through; said nozzle into the die.

a fluid under pressure into 17. A casting machine having, incombination, a receptacle for the material tobe the matecast, a movablecast, a movable pressure chamber provided with a duct terminating in anozzle, adapted to be submerged below the surface of such material forpermitting such material to flow into the pressure chamber through saidnozzle, said nozzle providing the only inlet for such material to enterthe pressure chamber, fluid pressure means for raising said nozzle abovethe surface of such material, means for locking the pressure chamber inthe casting position with its nozzle above the surface of the materialin the receptacle, movable die-supporting means, a die carried by thedie-supporting means to move therewith and adapted to receive directlyfrom the nozzle the material to be cast, means for clamping the diefirmly to the nozzle in the elevated and locked position of the latter,fluid pressure means for'moving the die-supporting means together withthe die carried thereby, and means for supplying and admitting a fluidunder pressure into the pressure chamber to act upon the material withinthe pressure chamber and eject such material from the pressure chamberthrough said nozzle into the die.

18. A casting machinehaving, in combination, a receptacle for thematerial to be ressure chamber provided with a duct terminating in anozzle adapted to be submerged below the surface of such material forpermitting such material to flow into the pressure chamberthrough saidnozzle, said nozzle providing the only inlet for such material to enterthe pressure chamber, fluid pressure means including a piston forraising said nozzle above the surface of such material, means forlocking the pressure chamber in the casting position with its nozzleabove the surface of the material in the receptacle, movablediesupporting means, a die carried by the diesupporting means to movetherewith and adapted to receive directly from the nozzle the materialto be cast, means for clamping the die firmly to the nozzle in theelevated and locked position of the latter, fluid pressure meansincluding a piston for moving the die-supporting means together with the(lie carried thereby,- means for supplying and admitting a fluid underpressure into the pressure chamber to act upon the material within thebressure chamber and eject such material from the pressure chamberthrough said nozzle into the die, and fluid pressure controlling meansfor operating the respective pistons of the different fluid pressuremeans successively, whereby the nozzle is elevated above the surface ofthe material in the receptacle and locked in the die is unclainped fromthe nozzle and flow into the pressure chamber through said nozzle, saidnozzle providing the only inlet for such material to enter the pressurechamber, means for raising said nozzle above the surface of suchmaterial, means for locking the pressure chamber in casting positionwith its nozzle above the surface of the material in the receptacle,movable die-supporting means, a die carried by the die-supporting? meansto move therewith and adapted to receive directly from the nozzle thematerial to be cast, means for clamping the die firmly to the nozzle inthe elevated and locked position of the latter, means for supplying andadmittin afiuid under pressure to the pressure cham er to act upon thematerial within the pressure chamber and eject such material from thepressure chamber through said nozzle into the die, a valve device incontrol of the. pressure fluid for the pressure chamber, and means incontrol of said valve device for preventing the admission of pressurefluid into the pressure chamber until after the die has been clamped tothe nozzle.

20. A casting machine having, incombination, a receptacle for thematerial to be v cast, a movable pressure chamber provided ber in thecasting position with its nozzle above the surface of the material inthe receptacle, movable die-supporting means, a die carried by thedie-supporting means to move therewith and adapted to receive directlyfrom the nozzle the material-to be cast, means for clamping the diefirmly to the nozzle in the elevated and locked position ofthe latter,fluid pressure means for moving the die-supporting means together withthe die carried thereby, means for supplying and admitting a fluid underpressure into the pressure chamber to act upon the material within thepressure chamber and eject such material from the pressure chamberthrough said nozzle into the die. a valve device in control of thepressure fluid for the pressure chamber, and means in control of saidvalve device for preventing the admission of pressure fluid into thepressure chamber until after the die has been clamped to the nozzle.

21. A casting machine having, in combination, a receptacle for thematerial to be cast, a movable pressure chamber provided with a ductterminating in a nozzle adapted to be 'submerged below the surface ofsuch material for permitting such material to flow into the pressurechamber through said nozzle, said nozzle providing the only inlet forsuch material to enter the pressure chamber, fluid pressure meansincluding a piston forvraising said nozzle above the surface of suchmaterial,means for locking the pressure chamber in the casting positionwith its nozzle above the surface of the material in the receptacle,movable die-supporting means, a die carried by the die-supporting meansto move therewith and adapted to receive directly from the nozzle thematerial to be cast, means for clamping the die firmly to the nozzle inthe elevated and locked position of the latter, fluid pressure meansincluding a piston for moving the die-supporting means together with thedie carried thereby, means for supplying and admitting a fluid underpressure into the pressure chamber to act upon the material within thepressure chamber and eject such material from the pressure chamberthrough said nozzle into the die, fluid pressure controlling means foroperating the respective pistons of the difierent fluid pressure meanssuccessively, whereby the nozzle is elevated above the surface of thematerial in the receptacle and locked in that position and thereafterthe die is clamped to the nozzle,

and whereby after the material has been forced into the die the die isunclamped from the nozzle and thereafter the pressure chamber isoperated to again submerge the nozzle below the surface of the materialin the receptacle, a. valve device in control of the pressure fluid forthe pressure chamber, and means in control of said valve device forpreventing the admission of pressure fluid into the pressure chamberuntil after the die has been clamped to the nozzle.

22. A die casting machine comprising a receptacle for the material to becast, a movable ladle provided with a duct terminating in a nozzle,means for admitting the material to be cast into the ladle, a movabledie adapted to receive directly from the nozzle the material to be cast,and means for forcing the material to be cast from the ladle through thenozzle directly into the die.

23. A die casting machine comprising a receptacle for the material to becast, a movable ladle provided with a nozzle mounted thereon. means foradmitting the material to be cast into the ladle, a movable die, meansfor moving the die and nozzle relatively to each other, means forlocking the die to the nozzle just above the surface of the material tobe cast, and means for forcing the,

material to be cast from the. ladle through the nozzle directly into thedie.

24. A casting machine having in combination a melting pot, a movablepressure chamber terminating in a nozzle adapted to be submerged belowthe surface of the molten metal, means for moving the pressure chamberso that the nozzle is just above the surface of the molten metal, amovable die, means for locking the die to the nozzle, and means forforcing the molten metal from the pressure chamber through the nozzledirectly into the die.

25. A casting machine having in combination a melting pot, a movableladle'terminating in a nozzle adapted to be submerged below the surfaceof the molten metal, means for moving and locking the ladle so that thenozzle is just above the surface of the molten metal, a movable die,means for locking the die to the nozzle, and means for forcing themolten metal fromthe ladle.

through the nozzle directly into the die.

26. A die casting machine comprising a melting pot, a movable ladleterminating in a nozzle adapted to be submerged below the surface of themolten metal, means for moving the ladle so thatlthe nozzle is heldabove 27. A casting machine having in combination a receptacle for thematerial to be cast, a movable pressure chamber terminatin in a nozzle,means for admitting the molten metal into the pressure chamber, meansfor raising said nozzle above the surface of the molten metal, a movabledie, and fluid pressure means to discharge the molten metal directlyinto the die.

' 28. A casting machine havin in combination a melting pot, a movableie, a movable pressure chamber terminating in a nozzle adapted to besubmerged below the surface of the molten metal, means forraising andlocking 'said nozzle above the surface-of the molten metal, and meansfor supplying and admitting a fluid under pressure into the pressurechamber to force the molten metal in said meltin pot, means for rotatingthe and means for supplyingair ifr'ider pressure pressure cham er sothat the nozzle is subto the pressure chamber for forcing the. mergedbelow the surface of the molten molten metal from the pressure chamber10.- metal at one limit of movement ofsaid resthrough the nozzledirectly into the die. v a 5 sure chamber and adapted to lock wit the Intestimony whereof I have. aflixed mi; nozzle just above the surface ofthe molten signature.

' metal at the other limit of said movement, GEORGE WALDEMA

